Yalow is a computer programmer, currently freelancing after leaving the City University of New York, where he worked for about 20 years. He coined the phrase "Wimpy Zone".
He is a member of clubs in a number of cities, including NESFA (Boston), OSFCI (Portland, OR), FACT (Austin, TX), and SCIFI (Los Angeles). He is also a member of MCFI (Boston), which ran the Worldcon in 2004. He is a Fellow of NESFA. He will be GoH at Fencon XIV in 2017.
He has edited four books (three still in print) for NESFA Press.